Allow Traceur app to remove trace files.

Bug: 73660835
Test: With the other commit on this topic, clearing all trace files via
the app works properly.

Change-Id: I27a4a5a14d9afe817683f1b046a644648a84badc

private/traceur_app.te

@@ -9,7 +9,7 @@ userdebug_or_eng(`
 ')
 
 allow traceur_app trace_data_file:file create_file_perms;
-allow traceur_app trace_data_file:dir { add_name getattr search write };
+allow traceur_app trace_data_file:dir rw_dir_perms;
 allow traceur_app atrace_exec:file rx_file_perms;
 
 dontaudit traceur_app debugfs_tracing_debug:file audit_access;